1.5.2 Relay Identification
The models 1803PC, 1815, 1817, 1833, 1835 and 1837 telephone entry systems each have three
relays (Relay 0, 1, and 2) on the control board while the 1818 and 1838 access control systems each
have two (Relay 1, 2) relays. When Tracker boards are added to these systems, the output relay on
the Tracker boards are listed in the software sequentially, beginning with Relay 3 (Relays 0, 1 and 2
are on the main control board). Each of the relays on the tracker board can be set to either Normally
Open (NO) or Normally Closed (NC) by setting the relay shorting pin to the desired configuration.
When Tracker boards are used to expand the access control system, Relays 1 and 2 on the access
control system circuit board are used as Tracker Command (Cmd) relays with Relay 2 commanding
Tracker boards 1-8 (system relays 3-10) and Relay 1 commanding Tracker boards 9-16 (system
relays 11-18).
1803PC, 1815, 1817, 1833, 1835 and 1837 SYSTEMS ONLY
If both Relay 1 and Relay 2 are used to control Tracker boards, Relay 0 is used as the Primary Relay
that will open a visitor door or gate when the resident pushes "9" on their telephone. The 1818 and
1838 systems do not have Relay 0 because these systems do not provide any communication for
visitor entry.
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